Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/185—Acids; Anhydrides, halides or salts thereof, e.g. sulfur acids, imidic, hydrazonic or hydroximic acids
  • A61K31/19—Carboxylic acids, e.g. valproic acid
  • A61K31/195—Carboxylic acids, e.g. valproic acid having an amino group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/44—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin
  • A61Q19/08—Anti-ageing preparations
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q7/00—Preparations for affecting hair growth
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/70—Biological properties of the composition as a whole

Definitions

• the present invention relates to a collagen metabolism ameliorant containing N-methyl-L-serine as an active ingredient, more particularly, a collagen metabolism ameliorant efficacious against collagen hypometabolism caused by aging or diseases accompanied with an abnormal accumulation of collagen, such as hepatic and pulmonary fibroses, keloid, hypertrophic scar, scleroderma, fibrosis in the scalp, or the like.
• this invention relates to hair growth stimulants and skin aging inhibitors containing such a collagen metabolism ameliorant.
• collagen metabolism amelioration herein referred to is meant by normalization of a condition such that synthesis of collagen has abnormally progressed due to the loss of balance between synthesis and decomposition of collagen, or reactivation of such a condition as collagen hypometabolism.
• collagen metabolism is meant by a phenomenon such that collagen is being renewed at a constant rate as the collagen is undergoing synthesis and decomposition, namely, a metabolic turnover.
• hepatic fibrosis accompanied with hepatic cirrhosis arises from an increase of collagen biosynthesis [Science, Vol. 176, p. 795, (1972)] or a decrease of collagenolytic activity [Biochemical Journal, Vol. 118, p. 229 (1970) and Life Sciences, Vol. 30, p. 1379, (1982)].
• the decrease of the collagenolytic activity is accounted to be caused by a decreased collagenase activity in each tissue and/or skin fibroblasts [SKIN, Vol. 14, p. 217 (1972); Journal of Clinical Investigation, Vol. 56, p. 1175 (1975); and Life Sciences, Vol. 30, p. 23 (1982)], so that an enhancement of a collagenase activity is desired.
• This has been indicated in medical treatments of, for example, hepatic cirrhosis [IGAKU NO AYUMI, Vol. 136, No. 13, p. 1027 (1986)].
• metabolism of skin collagen is decreased not only by diseases as mentioned above but also by aging, whereby the collagen remains in the body for a long time and is subjected to a chemical modification to promote crosslinking thereof. It is known that there is formed a vicious circle such that the collagen thus loses its function as an anchorage for cells with the consequence that collagen metabolism is further decreased. Accordingly, it is said that aging of skin may be prevented by restraining the decrease in the collagen metabolism as well as preventing the formation of crosslinkages in collagen [CHEMISTRY TODAY, December, p.36 (1990)].
• the collagenase is a rate limiting enzyme acting during decomposing interstitial collagens (type-I, type-II and type-III collagens) in connective tissues, which plays an important role in collagen metabolism.
• the collagenase is produced as a precursor, i.e., procollagenase that is secreted from cells and assumed to be activated in vivo by a protease such as plasmin, stromelysin or the like [Biochemical Journal, Vol. 166, p. 21 (1977) and Proceedings of the National Academy of Sciences of the U.S.A., Vol. 86, p. 2632 (1989)].
• a substance to promote the production of the procollagenase namely, a collagen metabolism ameliorant
• a collagen metabolism ameliorant is considered to be efficacious, in medical treatment, against diseases accompanied with an abnormal accumulation of collagen or, in amelioration of collagen metabolism, against collagen hypometabolism caused by aging.
• an object of the present invention is to provide a collagen metabolism ameliorant, that is, a collagen metabolism ameliorating agent efficacious against collagen hypometabolism caused by aging or diseases accompanied with an abnormal accumulation of collagen, such as hepatic and pulmonary fibroses, keloid, hypertrophic scar, scleroderma, or fibrosis in the scalp, and further to provide useful hair growth stimulants and skin aging inhibitors.
• a collagen metabolism ameliorant that is, a collagen metabolism ameliorating agent efficacious against collagen hypometabolism caused by aging or diseases accompanied with an abnormal accumulation of collagen, such as hepatic and pulmonary fibroses, keloid, hypertrophic scar, scleroderma, or fibrosis in the scalp, and further to provide useful hair growth stimulants and skin aging inhibitors.
• N-methyl-L-serine has an action of promoting the production of the procollagenase, and accomplished the present invention.
• the present invention relates to a collagen metabolism ameliorant containing N-methyl-L-serine as an active ingredient and its use.
• the collagen metabolism ameliorant according to the present invention can be compounded with a known ingredient according to its use object and prepared into a dosage form suited for peroral administration or parenteral administration such as injection, percutaneousness or the like, by a usual process.
• This ameliorant is administered perorally or parenterally, such as by injection, percutaneousness or the like, to the human body.
• a dosage form for peroral administration mention may be made of solid preparations such as tablets, granules, powders, particulates, hard gelatine capsules and the like, and in addition, solutions such as syrups, elixirs, elastic capsules and the like.
• Injections are prepared by dissolving or emulsifying N-methyl-L-serine in physiological salt solution or a lipid diluting agent such as vegetable oils, oil emulsions, glycols or the like, and encapsulating germfreely into ampuls or vials.
• physiological salt solution or a lipid diluting agent such as vegetable oils, oil emulsions, glycols or the like
• Percutaneous medicaments include ointments, lotions, cataplasms, gels, creams, solutions, aerosols, baths, patches and the like.
• the collagen metabolism ameliorant according to the present invention is administered perorally or parenterally.
• the collagen metabolism ameliorant of the present invention is administered perorally or by injection, and in the case of a disease accompanied with an abnormal accumulation of collagen in skin, such as keloid, hypertrophic scar, fibrosis in the scalp, and the like, it is administered percutaneously or by a regional injection.
• the collagen metabolism ameliorant according to the present invention is administered perorally or percutaneously.
• the dosage depends upon the age, weight, conditions of a patient to be administered, dosage form and the like, in the case of adults, generally a dose of 0.1-1,000 mg as N-methyl-L-serine and 1-3 doses a day are administered.
• a dose of 30-1,000 mg by peroral or injection administration is appropriate, while in the case of a disease accompanied with an abnormal accumulation of collagen in skin, such as keloid, hypertrophic scar, fibrosis of the scalp and the like, or a skin with collagen hypometabolism caused by aging, a dose of 0.1-50 mg by percutaneous administration is appropriate.
• the collagen metabolism ameliorant according to the present invention can be used as a hair growth stimulant and a skin aging inhibitor.
• the hair growth stimulant can be compounded with a known material according to a usual process and prepared into preventives for hair falling-off, hair-restorers, and further into the form of a hair-restoring cosmetics such as shampoo, rinse, hair tonic, hair lotion, hair cream, hair conditioners, hair gel, hair mist, hair foam and the like.
• a hair-restoring cosmetics such as shampoo, rinse, hair tonic, hair lotion, hair cream, hair conditioners, hair gel, hair mist, hair foam and the like.
• N-methyl-L-serine is compounded in an amount of 0.001-10.0% by weight (hereinafter abbreviated as "wt.%”) (based on the total amount), preferably 0.01-5.0 wt.%.
• the skin aging inhibitor can be compounded with a known material according to a usual process and prepared into dermal cosmetics such as wrinkle preventives, ointments and, further into the form of skin lotion, skin milk, skin cream, pack or the like.
• N-methyl-L-serine is compounded in an amount of 0.001-10.0% by weight (hereinafter abbreviated as "wt.%”) (based on the total amount), preferably 0.01-5.0 wt%.
• HF medium a medium prepared by dissolving 10.6 g of Ham's F12 powdery medium (manufactured by Nissui Pharmaceutical Co.) in refined water.
• HF-AV medium a medium prepared by admixing 1 liter of the HF medium with 1.76 g of a powdery Eagle's aminoacid vitamin medium (manufactured by Nissui Pharmaceutical Co.), 1.6 g of sodium carbonate, 50 mg of streptomycin sulfate and 60 mg of kanamycin sulfate and then blowing carbonic acid gas thereinto to adjust the pH value to about 7.
• TRIS tris(hydroxymehtyl)aminomethane.
• MES buffer solution a buffer solution prepared by adjusting the pH value of a 50mM 2-(N-morpholino)ethane sulfonic acid monohydrate aqueous solution containing a 0.5M NaCl, a 1mM CaCl2 and 0.05% by volume of BRIJ-35 (the trademark of polyoxyethylene laurylalcohol) to 6.5 at 4°C with a TRIS aqueous solution.
• BRIJ-35 the trademark of polyoxyethylene laurylalcohol
• Acetic acid buffer solution a buffer solution prepared by adjusting the pH value of a 25mM acetic acid aqueous solution containing a 0.5M NaCl, a 1mM CaCl2 and 0.05% by volume of BRIJ-35 to 4.5 at 4°C with a TRIS aqueous solution.
• MES-A buffer solution a buffer solution prepared by adjusting the pH value of the MES buffer solution to 7 at 4°C with a TRIS aqueous solution.
• MES-B buffer solution a buffer solution prepared by mixing the MES buffer solution with the acetic acid buffer solution and adjusting the pH value to 2 at 4°C.
• Buffer solution for measurement a buffer solution prepared by adjusting the pH value of a 50mM TRIS aqueous solution containing a 0.2M NaCl, a 5mM CaCl2 and 0.05% by volume of BRIJ-35 to 7.5 at room temperature with hydrochloric acid.
• MSE N-methyl-L-serine
• a test was carried out using anchorage independent cell strain which is derived from a human fibrosarcoma cell strain HT 1080 (ATCC CCLl2l) and growable in a serum-free, protein-free medium (referred to as "human fibrosarcoma cell strain HT-Pll", owned by the Research Laboratories of Biochemistry, Kanebo, Ltd.).
• the cells were pre-cultured as below to prepare a cell suspension which was then tested.
• the human fibrosarcoma cell strain HT-Pll was suspended with a density of 1 ⁇ 105 cells/ml in the HF-AV medium. Flasks (each having a base area of 75 cm2) were charged, respectively, with 20 ml of the resulting suspension, and stationarily cultured at 37°C for 3 days in a 95% air/5% carbonic acid gas atmosphere.
• the cells were collected by centrifugation (at 600 rpm for 10 min.). The obtained cells were suspended in the HF-AV medium to prepare a cell suspension with a density of 7 ⁇ 104 cells/ml.
• the volume of the solution was increased to 2.5 ml by adding the MES-A buffer solution thereto. Then, using the buffer solution for measurement, a solution containing about 0.1-0.7 unit/ml of the procollagenase was prepared as a test liquid.
• test liquid 50 ⁇ l of the test liquid were admixed with 20 ⁇ l of a trypsin solution ("Type 12" manufactured by Sigma Chemical, adjusted into a 1 mg/ml concentration with the buffer solution for measurement) and, after incubating at 35°C for 5 min., further admixed with 30 ⁇ l of a soybean trypsin inhibitor solution ("No. 24020" manufactured by Merck, was adjusted into a 3 mg/ml concentration with the buffer solution for measurement) to inactivate the trypsin and a collagenase solution was obtained.
• a trypsin solution Type 12 manufactured by Sigma Chemical, adjusted into a 1 mg/ml concentration with the buffer solution for measurement
• soybean trypsin inhibitor solution No. 24020
• FITC fluorescein isothiocyanate
• N-methyl-L-serine promoted the production of the procollagenase.
• a model animal of hepatic fibosis was prepared and tested.
• a 2 ml/kg dose of an equivalent mixture of carbon tetrachloride (hereinafter abbreviated as "CCl4") and olive oil was administered hypodermically to the back of male rats of Wistar origin (5 weeks old; a weight of 112-134 g; and 5 rats/group) twice a week (on Monday and Thursday) for 10 weeks to produce rats of hepatic fibrosis.
• a 3 ml/kg dose of a 66.6 mg/ml conc. test compound aqueous solution was administered perorally once a day for continual 7 weeks (except Sundays) from the 4th week after the commencement of the CCl4 administration.
• the whole blood was gathered from the abdominal aorta and collected in a test tube treated with heparin. This was centrifuged to obtain blood plasma. The blood plasma was stored at -80°C until the under-mentioned biochemical examinations.
• the liver was extracted, weighed and divided into halves under an ice-chilled condition. Then, one of the halves was frozen at -80°C for quantification of hydroxyproline (hereinafter abbreviated as "Hyp") in the liver and the other half was fixed with a 10% formaline solution for a histological examination.
• Hyp hydroxyproline
• the Hyp in the liver and blood were quantified. Additionally, the Hyp is an index of the quantity of the collagen [Methods of Biochemical Analysis, Vol. 15, p. 25 (1967)]. Further, biochemical examinations of the blood plasma [refer to the under-described items (b)-(h)] and histological examinations of the liver [refer to the under-described item (i)], as indices of liver injury, were conducted.
• Each examination item and examination method are as follows.
• the MSE administered group had significantly a low Hyp content in the liver and significantly a high Hyp content in blood, as compared with the untreated group.
• the biochemical examination values of the blood plasma of the MSE administered group are significantly low with respect of GPT, GOT, ⁇ -GTP, gross bilirubin, alkaline phosphatase and ZTT, as compared with those of the untreated group. From this fact, it can be said that the collagen metabolism ameliorant of the present invention ameliorated a liver injury accompanied with hepatic fibrosis.
• a pharmacopoeial water-absorbing ointment was blended with the compounding materials of the under-described example or comparative example in the under-described contents (weight %, hereinafter abbreviated as "wt.%") and a test cream was prepared (additionally, an ointment without compounding these materials was used as a control).
• Test compound Male hairless rats of Wistar strain (6 weeks old; a weight of 110g-130 g; 5 rats/group) were hair-trimmed at their dorsal region. The test compound was applied everyday in an amount of 0.1 g/2 cm ⁇ 2 cm area onto a right shoulder position. On the 45th day after the commencement of the test, a skin-viscoelasticity was measured with a vibration-type skin-viscoelastometer described in Japanese Patent Laid-open Application No. 59-120,130.
• testees who were patients of androgenic alopecia had the hair of the head shaved into a round shape of a 1 cm diameter at two testing positions 5 cm above the both ears.
• the testing position on the left side was applied with about 3 ml of the test compound every morning and every evening and compared with the untreated, right side position.
• 20 hairs each on both the testing positions were shaved off.
• the mean length (B) on the left side (applied with the compound of the example or comparative example) and the mean length (A) on the right side (untreated) were found.
• the appraisal of the effect was shown by the mean (B)/(A) of 10 testees.
• Hairless rats having an insoluble skin collagen increased with aging were used for evaluation.
• MSE ointment The ointment prepared in Example 11 (hereinafter abbreviated as "MSE ointment”) and the ointment prepared in Comparative Example 11 (hereinafter abbreviated as “control ointment”) were used.
• Fifteen male hairless rats of Wistar origin (6 weeks old; a weight of 110-130 g) were divided into 3 groups each consisting of 5 rats. Among them, one group was applied with the control ointment and another one group was applied with the MSE ointment, in an amount of 0.1 g onto the back right shoulder, once a day for continual 60 days. After 60 days, skins were cut off and subcutaneous fat was removed therefrom to provide skins of a 15 weeks old rat group applied with the control ointment (aged skins) and of a 15 weeks old rat group applied with the MSE ointment, respectively.
• the obtained suspension was shaken at 4°C at 120 rpm for 24 hours and then centrifuged at 2,000 g for 10 minutes. Thus, a fraction solubilizable at 4°C was obtained.
• the MSE ointment restrains an increase of a constitutional proportion of a hard-extractable collagen (collagen with many crosslinkages) with aging and acts to maintain the constitutional proportion of the collagen on the level of 6 weeks old.
• test compound aqueous solution that had been prepared by dissolving the test compound in refined water was perorally administered once in a dose of 0.2 ml/kg of the body weight (5 g/kg of the body weight, as the test compound).
• mice were observed for 7 days and no deaths by administration of the test compound were recognized.
• An abraded region (injured region) was produced on the hair-trimmed back of the rabbits.
• An adhesive plaster for a patch test (RIBBON-AIDTM of 1.2 cm ⁇ 1.6 cm, manufactured by Liba-Tape & Co., Ltd.) was impregnated with 0.1 ml of a 1 wt.% test compound aqueous solution that had been prepared by dissolving the test compound in refined water and attached onto the injured skin and a normal skin, respectively. After 24 hours, the plaster was detached to observe erythematic and edematous conditions of the skins. After 48 hours from detaching of the plaster, the same observation was made. Erythematic scores and edematous scores were recorded based on the criteria of assessment shown in Table 8.
• Primary irritant score (A24+A48)/2 + (B24+B48)/2 + (X24+X48)/2 + (Y24+Y48)/2 where each symbol has the following meaning:
• Table 10 Sample Compounded material Content (wt%) Practicality test (No. of persons) Hair growth Prevention of hair falling-off Prevention of dandruff
• Example 1 MSE 0.1 15 15 10
• Example 2 MSE 0.5 16 17 12
• Example 3 MSE 4.0 18 17 14
• Comparative Example 1 Red pepper tinctures 0.1 5 7 4
• Comparative Example 2 Japanese swertia extracts 5.0 4 6 6
• Comparative Example 3 Ethyl nicotinate 0.1 5 6 5
• Table 11 Sample Compounded material Content (wt%) Practicality test (No.
• testees Twenty female testees (35-55 years of age) who complained of rough skin, fine wrinkles, dry skin and the like, were made to use the test compound every morning and evening for continual 3 months. Then, the testees appraised the effect with respect to improvements of skin in softness, elasticity and wrinkles. The effects of the above items were shown by the number of the testees answered “the softness of skin has been improved”, “the elasticity of skin has been improved” and “the wrinkles of skin have been ameliorated", respectively.
• the MSE was added to and dissolved in the under-described hydrophilic ingredients in an amount of 0.1 wt.% (Example 1), 0.5 wt.% (Example 2) or 4.0 wt.% (Example 3). Then, the resulting solution was mixed with the under-described lipophilic ingredients and stirred to disperse therein. Thus, oily hair tonics were prepared.
• Oily hair tonics were prepared in the same manner as Example 1, except that the MSE was replaced by 0.1 wt.% of red pepper tinctures (Comparative Example 1), 5.0 wt.% of Japanese swertia extracts (Comparative Example 2) or 0.1 wt.% of ethyl nicotinate (Comparative Example 3).
• the MSE was added to and dissolved in the under-described hydrophilic ingredients in an amount of 0.2 wt.% (Example 4) or 3.0 wt.% (Example 5). Then, the resulting solution was mixed with the under-described lipophilic ingredients at 80°C. While stirring, the resultant was cooled down to 50°C where an aromatic ingredient was added and stirring was further continued until 30°C was reached. Thus, hair creams were prepared.
• Hair creams were prepared in the same manner as Example 4, except that the MSE was replaced by 0.1 wt.% of red pepper tinctures (Comparative Example 4), 0.1 wt.% of biotin (Comparative Example 5) or 2.0 wt.% of panthenol (Comparative Example 6).
• the MSE was added to and dissolved in the under-described hydrophilic ingredients in an amount of 0.1 wt.% (Example 6), 1.0 wt.% (Example 7) or 4.0 wt.% (Example 8). After dissolving, the resulting solution was admixed with the under-described lipophilic ingredients which had been homogeneously dissolved by heating and stirring at 75°C for 5 minutes. The mixture was stirred into a homogeneous dispersion which was then cooled down to 30°C while stirring. Thus, skin milks were prepared.
• Skin milks were prepared in the same manner as Example 6, except that the MSE was replaced by 5.0 wt.% of ⁇ -oryzanol (Comparative Example 7) or 0.1 wt.% of ethyl nicotinate (Comparative Example 8).
• the MSE was added to the under-described hydrophilic ingredients which had been dissolved by heating at 80°C, in an amount of 0.2 wt.% (Example 9) or 4.0 wt.% (Example 10). After dissolving, the resulting solution was admixed with the under-described lipophilic ingredients which had been dissolved by heating at 80°C. Then, the mixture was stirred into a homogeneous dispersion which was then cooled down to 30°C while stirring. Thus, skin creams were prepared.
• Skin creams were prepared in the same manner as Example 9, except that the MSE was replaced by 5.0 wt.% of panthenol (Comparative Example 10) or 0.1 wt.% of biotin (Comparative Example 10).
• the under-described lipophilic ingredients were dissolved by heating at 80°C, and the under-described hydrophilic ingredients which had been dissolved by heating at 80°C were added thereto and mixed by stirring. Then, while stirring, the mixture was gradually cooled down to room temperature. Thus, a water-absorbing ointment was prepared.
• a water-absorbing ointment was prepared in the same manner as Example 11, except that the MSE was replaced by refined water.
• N-methyl-L-serine is a safe compound free from toxicity and skin irritation (Experimental Examples 7 and 8).
• the N-methyl-L-serine according to the present invention is efficacious, as a collagen metabolism ameliorant as well as a hair growth stimulant and a skin aging inhibitor, against collagen hypometabolism caused by aging or diseases accompanied with an abnormal accumulation of collagen.

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• 1991
  • 1991-07-12 WO PCT/JP1991/000937 patent/WO1992000733A1/ja active IP Right Grant
  • 1991-07-12 EP EP91912371A patent/EP0506965B1/de not_active Expired - Lifetime
  • 1991-07-12 DE DE69110861T patent/DE69110861T2/de not_active Expired - Lifetime

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